设置的LinearLayout的可见性问题 [英] Issue when setting visibility of LinearLayout

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本文介绍了设置的LinearLayout的可见性问题的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

相关XML:

<LinearLayout
    android:id="@+id/linear_layout_video_feed_list_view"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:layout_weight="2">
    <ListView
    android:id="@+id/list_video_feed"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    </ListView>
</LinearLayout>

相关code:

linearLayoutVideoFeedListView = (LinearLayout) findViewById(R.id.linear_layout_video_feed_list_view);
lv = (ListView) findViewById(R.id.list_video_feed)

lv.setVisibility(GONE)的作品,但 linearLayoutVideoFeedListView.setVisibility(GONE)将导致空指针异常。任何人都知道为什么吗?

lv.setVisibility(GONE) works but linearLayoutVideoFeedListView.setVisibility(GONE) causes nullpointer exception. Anyone know why?

推荐答案

如果linear_layout_video_feed_list_view尚未奠定了你打电话之前

If linear_layout_video_feed_list_view has not been laid out before you call

linearLayoutVideoFeedListView.setVisibility(消失)

linearLayoutVideoFeedListView.setVisibility(GONE)

这将导致空指针。
如果这里确实是问题,尝试充气吧:

it will result in a Null Pointer. If this is indeed the problem here, try inflating it:

LayoutInflater吹气=(LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  RelativeLayout的MyView的=(RelativeLayout的)mInflater.inflate(R.id.linear_layout_video_feed_list_view,NULL);

LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); RelativeLayout myView = (RelativeLayout) mInflater.inflate(R.id.linear_layout_video_feed_list_view, null);

希望帮助

这篇关于设置的LinearLayout的可见性问题的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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